Author's reply

Affiliations

• ¹ Department of Emergency and Critical Care Medicine, Hitachi General Hospital, 2-1-1, Jonancho, Ibaraki, Hitachi 317-0077, Japan. Electronic address: knakamura-tky@umin.ac.jp.
• ² Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. Electronic address: hohbey@gmail.com.
• ³ Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. Electronic address: yasunagah-tky@umin.ac.jp.